The photographic news

• Bandzählung: 6.1862
• Erscheinungsdatum: 1862
• Sprache: Englisch
• Signatur: F 135
• Vorlage: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: SLUB Dresden
• Rechtehinweis: Public Domain Mark 1.0
• URN: urn:nbn:de:bsz:14-db-id1780948042-186200003
• PURL: http://digital.slub-dresden.de/id1780948042-18620000
• OAI: oai:de:slub-dresden:db:id-1780948042-18620000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Bemerkung: Seite 1-72 fehlen in der Vorlage. Vorlagebedingter Textverlust.
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

248 THE PHOTOGRAPHIC NEWS. [May 23,1862. Mix Nos. 1 and 2 by pouring the gold into the soda. Then add the nitrate of uranium, and filter. This will tone nearly 200 prints, when a new bath can be prepared, to which this old one may be added, and the tone in most cases improved; but should there be any mealiness, lay aside the whole bath, and prepare a new one, reserving it for future use, and it may be added gradually to the new baths. Always wash the prints well, as in other alkaline baths, and immerse in the above the usual time. On removal from the toning bath, wash carefully, and fix in a solution of hyposulphite. The foregoing method of toning is now adopted in the most extensive establishments in New York. On trial, it will prove the most practicable, and there is not so much waste of chemicals. The use of aqua-ammonia in all the silver solutions for the albumen paper, is recommended. Difficulties will occur in the use of all baths, and slight variations in the proportions of the chemicals of each of the toning baths, as laid down in this book, may be adopted. Great attention should be paid to the quality of the paper, and to the negatives, which must possess all the requisites for a good print. Wash carefully through all the various stages, until the final mounting of the picture.—American Journal of Photography. VARNISHING PHOTOGRAPHS. The practice of varnishing photographs has always, in our own opinion, issued in spoiling them. As, however, it meets the taste of some photographers, and is much prac tised on the Continent for large developed prints, we sub join a couple of letters on the subject from American journals. The first is signed J. Longwell, and is as follows:— “ Take a clean glass the size of the picture, warm it suffi ciently to melt bees’ wax, which is to be rubbed over one side. With a piece of Canton flannel rub the superfluous bees’ wax off, leaving only a thin even film on the glass. It should present no uneven ridges or markings caused by rubbing; they would show afterwards in the picture. Set the plate aside. “ Enamelling Solution. Patent gelatine ... ... ... 1} ounces Alcohol ... ... ... ... 2] „ Water 75 „ “Put altogether in a bottle, and melt in a water bath. When dissolved, filter into aflat dish. A moderate heat should be kept under the dish, so that the solution may be kept fluid, and not allowed to cool. Float the picture for three minutes, picture side down, carefully expelling all air bubbles, the same as albumenizing paper. Raise it up, and let it drip a moment. Have on hand a pail of clean water. Hold the picture by the upper edge in the right hand, and take the glass previously waxed in the left hand. Let them both descend (a few inches apart) perpendicularly into the pail of water, which should be deep enough to cover them. Bring the upper edge of the picture even with the upper edge of the waxed side of the glass. Hold the two firmly together, and gradually raise them out of the water. The picture now adheres very nicely to the glass. Should there be any air bubbles, they must be worked out. The glass can now be laid flat, a piece of blotting paper laid over the picture, a glass on top of that, and a moderate weight on top of all for a few hours. Then place the picture and glass where they will thoroughly dry, when the picture will come off with a beautiful enamelled surface.” The next letter is from Mr. Sinclair, as follows:— “ Many good operators oppose the use of any varnish, or sizing of any kind, after the photograph is mounted, and tell us that it destroys the artistic effect: that an engraving is always injured by varnishing; that photographs should resemble engravings as much as possible, and therefor should not be varnished, and much more to the same efiedt It is not my intention to dispute these statements, notwitt standing my non-concurrence in them, but merely to st® my opinion and the reasons I have for it. “ Those who follow photography as an amusement are» perfect liberty to varnish their pictures or leave them plait and nobody has any right to find fault, but with those wbl follow it as a business the case is very different, nine out 4 ten of our customers want their pictures varnished; 1 The look so much betterunder these circumstances we hl* the strongest reason in Dollardom in behalf of our practiw but I hold that a properly varnished photograph is mor lasting than one not so protected. I have some photograph that have been exposed to the fumes of coal-gas until * unvarnished cardboard upon which they are mounted b become quite yellow, yet the photograph is unhar while others left plain are considerably faded, and this think conclusive evidence that varnishing is not only' injury, but a positive benefit to the photograph; and 8 have no patent process to sell, I think it will do no harml let your readers know what I use, and perhaps save me" trouble of sending it to some of them as I have had freque® applications for my process. “ I take fine picked gum arabic and make a solution ah* as thick as collodion, and spread one coat over the pho™ graph with a clean brush and set it aside to dry: when dr I take the ‘ Artist’s Picture Varnish ’ (to be had of colormen and dealers in artist’s materials), and havi diluted it with twice its bulk of spirits of turpentine, I g" the pictute a thin coat, which finishes the operation. J “ If the gum is too thick it will crack, and the picture "I be spoiled ; if too thin, the varnish will strike through, 80 produce transparent spots, but if the gum and varnish ® of the proper consistency and neatly laid on, the surface" be almost as fine as heavy albumenized paper.” RAPID DRY PROCESSES. The great problem of an instantaneous dry process is ’ yet completely solved. Dr. Henry Draper’s process is oD a step in that direction, although it has been demonstrs", to be a genuine discovery of real and great utility, yet led" much still to be desired and to be accomplished. The dry plates wanted are such as can be used in ordinary work of the practical photographer—portraitli When such plates are found, Humidus’ occupation will/ gone, he will needs go drown himself. Who would dabl I about a silver bath in a dark room at the top of a h0” reeking with fumes of drugs and heat, when he could his plates, all prepared at a cheaper rate, or if he could r pare them himself in the cool of the evening or mordta or prepare a store for the whole summer in the brd® winter atmosphere ? 8 Depend upon it, photographers, the time is coming "e you will abandon your silver bath and collodion, and " you will have no more risk of staining your carpets patrons with silver solutions than the Emperor of C Here is work for the experimenters ; let them bend t selves to it, for it must be done. We sincerely believe 'j the next great sensation which shall send a thrill thr0 the photographic world is a genuine instantaneots process. JH While the ink on the above is still wet, the Photoy^f Notes, of April 15th, reaches us, and we find that Mr. Sa therein tells his readers that he has “succeeded in prePPt rapid dry plates as sensitive as the best wet collodionide these plates yield excellent printing negatives,” &c. Ad begin to think the great time has surely come. But j on he tells us that the principle on which these Ei “consists in using a suitable iodized collodion, in Wdr the excited film thoroughly from the silver bath, in 0m prevent stains, and in restoring the sensitiveness by ne of fresh silver added to a suitable preservative, whic 1 Mal become a film preserv it will Sutton tion.— PHOT Last s ascensi positio city mi their 1 advant of the service imeri graphs scope, leisure Seci privat tion. ; We sions, who i callin, which dent, vice-p positi the s worth wond of sci The for a Hr Were Hen W oft’ Man socil inst the M the the of s of : dev ace thi de, tic Pr